package com.draemon.haixiawenti.util;

import java.security.MessageDigest;

/**
 * <p></p>
 *
 * @author  yangz
 * @date    2016/10/28
 * @version latest
 */
public class DigestUtil {

    public static String sha1(String input) {
        try {
            MessageDigest mDigest = MessageDigest.getInstance("SHA1");
            byte[] result = mDigest.digest(input.getBytes());
            StringBuffer sb = new StringBuffer();
            for (int i = 0; i < result.length; i++) {
                sb.append(Integer.toString((result[i] & 0xff) + 0x100, 16).substring(1));
            }

            return sb.toString();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * 对字符串md5加密
     *
     * @param str
     * @return
     */
    public static String md5(String str) {
        MessageDigest md5 = null;
        try{
            md5 = MessageDigest.getInstance("MD5");
        }catch (Exception e){
            System.out.println(e.toString());
            e.printStackTrace();
            return "";
        }
        char[] charArray = str.toCharArray();
        byte[] byteArray = new byte[charArray.length];

        for (int i = 0; i < charArray.length; i++)
            byteArray[i] = (byte) charArray[i];
        byte[] md5Bytes = md5.digest(byteArray);
        StringBuffer hexValue = new StringBuffer();
        for (int i = 0; i < md5Bytes.length; i++){
            int val = ((int) md5Bytes[i]) & 0xff;
            if (val < 16)
                hexValue.append("0");
            hexValue.append(Integer.toHexString(val));
        }
        return hexValue.toString();
    }

    public static void main(String[] args){
        System.out.println(md5("sign18559161957"));
    }
}
